Breast grooving and lip forming machine for heels



J ne 19, 93 c. D. KNOWLTON BREAST GROOVING AND LIP FORMING MACHINE) FOR HEELS 3 Sheets-Sheet 1 Filed Feb. 19, 1952 K FW June 19, 1934. c KNOWLTON 1,963,203

BREAST GROOVING AND LIP FORMING MACHINE FOR HEELS Filed Feb. 19, 1932 3 Sheets-Sheet 2 Mkm June 19, 1934. c. 0. KNOWLTON BREAST GROOVING AND LIP FORMING MACHINE FOR HEELS 3 Sheets-Sheet 3 Filed Feb. 19. 1932 26 WVE/VTU/F (Ldbfis Mamba,

Patented June 19, 1934 UNITED STATES BREAST GROOVING AND LIP FORMING MACHINE FOR HEELS Cutler D. Knowlton,

Beverly, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application February 19, 1932, Serial No. 594,071 10 Claims. 12-471) This invention relates to the manufacture of is and is illustrated as embodied in a machine for grooving wood heels. Heretofore there have been known in the trade two types of wood heels,

Cuban and Louis. Those of the former type have a generally vertical breast surface which is concave .in horizontal cross-section. In those of the latter type the breast surface is nearly or quite flat horizontal cross-section but vertically it sweeps backward and upward and then forward and upward to form .a forwardly extending lip. The attaching face of a Louis heel is thus considerably longer than that of a Cuban heel of the samesize, and the Louis heel therefore has certa n-1 mednanical advantages over the Cuban :as regards stability, against lengthwise stresses.

The inventions of H. W. Russ, described and claimed United :States Letters Patents No. 1,528,315 and No. 1,536,691, granted March 3,

1025 and May .5, .1925, respectively, provided Cuban heels and a machine for making them, in which heels the breast corners appeared straight when viewed from the side. Heels of this type, as disclosed in the Letters Patent referred to,

u have had their breast surfaces shaped by rotating each heel blank past acutter about an axis which is perpendicular to the vertical longitudinal :central plane of the heel blank, the radius of .cur-vatime of the path of movement being adjusted to the curvature of the lateral surfaces of the blank, so that lines .of intersection appear straight from the side.

The invention of .H. R. Webster, -disclosed in United States Letters Patent No. 1,925,218,

granted September .5, on his application, contemplates .a heel combining the mechanical and aesthetic advantages of both the Louis heel and the type of Cuban heel just discussed. Such va heel has abreast surface which is of the .shape $0 ,iust discussed, but which turns over at its .upper end into a lip as in the Louis heel. The junction between the lip and the breast may be a sharp corner, or it maybe a curve as in the Louis heel. It an object of the present invention, broadto provide a machine for forming breast and lip. surfaces on heels having the appearance .of Cuban heels, .but also having shank lips, and particularly on such heels having straight appearing breast corners. To this end I have provided a machine having a cutter and means for moving a heel blank relatively into and partially past the cutter, the action of the cutter at the point of cessation of cutforming the shank lip. In the use of the illustrated machine the cutting of the 5 breast surface is effected substantially as shown in Letters Patent No. 1,536,691, above referred to. Instead of cutting clear through from the toplift surface to the attaching face, as in the use of machines of the type disclosed in Letters Patent No. 1,536,691, the organization of the illustrated machine is such .as to provide for stopping the cut at a point short of the attaching face, to leave a shank lip on the heel blank. Advantageously a positive stop is provided for arresting the relative movement of the cutter and work piece at the proper predetermined point.

In the use of a machine such as that disclosed in the Letters Patent just referred to, where the cut is carried clear through the blank, the shape of the cutter head, in so far as the vertical curvature of the .breast surface is concerned, is immaterial; the shape of the path in which the heel blank and cutter pass each other is the only matter of importance. When, as in the use of machines of the [type herein illustrated asembodying the present invention, the cut stops the heel blank, the effective shape of the cutter head is of importance since it determines the shape of the shank lip formed at the stopping :of the cut.

'I'herefore, accordance with another important feature of the invention, the illustrated cutter head is formed to generate an effective surface of revolution like the end of a thick-walled pipe, and the out is stopped at a point where the axis of the pipe is obtuse to the longitudinal horizontal axis of the heel blank. That part of the surface of revolution which is generated :by points in the wall of the .so-called pipe forms the shank lip on the heel blank, such lip being obviously convex toward the top-lift end of the blank.

Since the angle between the breast surface and the lip will generally be a large acute angle, the illustrated cutter blades may conveniently have two cutting edges meeting at such an angle. The

corners between these edges may be ground oil to .a rounded form a curve of transition between the breast and lip surfaces is :desired.

These and other features :of the inventioncomprising certain combinations and arrangements of parts be apparent from the following adescription of a preferred embodiment of the invention shown in the drawings, in which Fig. l is a plan view;

2 is an end elevation;

Fig. .3 is a detail perspective;

Fig. 4 is a sectional plan of the jack;

Fig. 5 is a sectional plan showing the completion of the cut;

:Fig. 6 is a rear elevation of the jack;

' clamped by a screw 32.

Fig. 7 is a plan of a cutter;

Fig. 8 is a perspective of a finished work piece; and

Figs. 9 and 10 show two types of finished heels.

The main frame 10 carries a horizontal cutter shaft 12 having a cutter head 14 on its end. The frame is provided'with a slideway 16 in its vertical side, in which the slide 18 is adjustable up and down by the screw 20, and clamped by the screw 22. The slide 16 is provided with a pivotal axis 24 around which a frame 26 is angularly adjustable by a screw 2'7 mounted in the frame.

The frame 26 is provided with a dovetail guide 29 on which a slide 30 is slidably adjustable and The slide 30 has an integral arm 34 provided with a slot 36 in which a shouldered pin 38 is adjustable. This pin has a round head 40 projecting above the top surface of the arm 34.

Resting on the upper surface of the arm 34 is a carrier plate 42 which is to swing on the arm 34. As illustrated this swing is circular, about the head 40 which engages in one of a series of holes 44 in the plate 42, the hole selected depending on the radius of swing desired.

The jack mechanism is mounted on the carrier plate 42. t comprises a'block 46 made in H form, the horizontal bar of the H being shown at 48. The block 46 is angularly adjustable about a screw-pivot 50 by means of clamp screw and slot means at 52, 54. The bar 48 constitutes a a slideway or guide for a split arm 56, 58, preferably formed in one piece. This bar 56, 58 is clamped in adjusted position in the guide 48 by screws 60, a fine adjustment being secured by a screw 62 extending between the block 46 and the bar 56. e

The jack itself is mounted on a bar 64 running in a, slideway at right angles to the bar 56, 58, and located between the arms 56, 58 of the bar. The bar 64 is adjusted and clamped by a screw and slot 66, 68, and a fine adjustment is secured by a screw 70 running between the the bar 64. r

a The bar 64 is recessed to provide a pivotal mounting '72 for a bell crank lever '74, which is resiliently pressed by a lever '76 pivotally mounted at '78 in the recess and controlled by a spring 80. The bell crank. lever '74 is pivoted to a lever 82 pivoted at 84 in a sliding block 86 running in a slideway in the bar 64. A spring-pressed plunger 88 rests against the lever 82. e

A jaw 90 is pivoted at 92 and 94 to the block 86 and the bar 64 respectively. A cam lever 96, pivoted at 98 to the bar 64, sets the jaw 90, any lost motion necessitated by varying thickness of the block 99 held between the jaw 90 and the jaw 100 on the block 46 being taken up by the mechanism 82, 74, 76, 60. I

A gage102 is provided to contact with the corner of the block 99 and a second gage 104 is provided on which the lower side of the block rests. A handle 106 is provided on the block 46 to assist in swinging the jack mechanism.

The cutter head 14 is provided with two outters 108. These cutters have twocutting edges at an acute angle with each other, as shown in Fig. 1, but may be formed as shown in Fig. 7, with a rounded corner between the cutting edges.

The machine is operated as follows. The operator clamps a heel block 99 between the jaws 90 and 100 in the position shown in Fig. 1, and then pivots the jack mechanism around the cen ter at 40 toward the cutter head. The heel block thus swings through the cutter head on a. circuplate 56 and lar arc as the cutters form the breast surface 110 on the block (Fig. 8). The swing is continued until the plate 42 contacts with a stop 112 on the frame 26. This stop comes into operation when the corner between the breast surface 110 and the lip surface 114 has been: reached, which leaves theblank in the condition shown in Fig. 8.

The cutters 198 will generate a surface of revolution like the end of a thick-walled pipe with an inward bevel. The corner between the cutting edges forms the surface 110, as shown in Fig. 5, and that part of the surface of revolution corresponding to the bevel on the pipe shapes the lip surface 114. The are 116 on which the surface 110 is formed is of such radius that when the lateral surfaces of the heel are formed, their intersections with the breast surface 110 will appear straight when seen from the side, as explained in the Russ patent above referred to, Fig. 9 showing the finished heel. In case a rounded corner between the surfaces 110 and 114 is desired the cutter shown in' Fig. '7 will be used, Fig. 10 showing the finished heel.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is: 1. In a heel grooving machine, a rotary cutter shaped to form the junction between the breast and shank lip surfaces of a heel blank, 2; heel blank holder arranged to hold a heel blank with its longitudinal vertical central plane passing through the axis of the cutter, and means for relatively moving the cutter and the holder in a path lying parallel to the said plane and heightwise of the heel blank to form a combined breast and lip surface on aheel blank in the holder. r

2. In a heel grooving machine, a rotary cutter shaped to form the junction between the breast and shank lip surfaces of a heel blank, a heel blank holder arranged to hold a heel blank with its longitudinal vertical central plane passing through'the axis of the cutter, and means'for relatively moving the cutter and the holderina curved path lying parallel to the said plane and heightwise of the heel blank to forma combined breast and lip surface on a heel blank in the holder. Y

3. In a 'heel grooving machine, a rotary cutter shape to form the junction between the breast and shank lip surfaces of a heel blank;a heel blank holder arranged to hold a heelblank with its longitudinal verticalcentral plane pass ing through the axis of the. cutter, and means for relatively guiding the cutter and the holder in a circular path lying parallelto the said plane to form a combined breast and lip surface ona heel blank in the holder the radius of the circular path being adjustable to form a breast surface which will intersect the lateral surfaces to be formed on the heel blank in breast edges which will lie in a plane. J

4. In a heel grooving machine, a rotary cutter shaped to generate an effective surface of revolution which is the end of a cylinder with thickened walls, a heel blank holder, and means for relatively moving the cutter and the breast surface of an ungrooved heel blank in the holder with its top-lift end leading, toforma heel breastsur face on the blank, and for stopping the out at a point short of the attaching face of the heel blank, to form a lip surface thereon.

5. In a heel grooving machine, a rotary cutter shaped to generate an effective surface of revolution which is the end of a cylinder with thickened walls, a heel blank holder, and means for relatively moving the cutter and the breast surface of an ungrooved heel blank in the holder with its top-lift end leading, in a path lying generally parallel to the vertical axis of the heel blank to form heel breast and shank lip surfaces on the blank.

6. In a heel grooving machine, a rotary cutter shaped to generate an effective surface of revolution which is the end of a cylinder with thickened Walls beveled inwardly, and means for relatively moving the cutter and a heel blank in the holder with the attaching face of the heel blank leading, and for stopping the cut at a point short of the attaching face of the blank with the longitudinal horizontal axis of the blank at an obtuse angle to the axis of the cutter.

7. In a heel grooving machine, a rotary cutter shaped to form a curved shank lip surface on a heel blank, a heel blank holder mounted for movement relative to the cutter to carry a heel blank with its top-lift end leading into engagement with the cutter in a path generally parallel to the vertical axis of a heel blank in the holder, and stop means to arrest the relative movement of the holder and cutter when the cutter has reached the location of the under side of the shank lip portion of the heel blank.

8. In a heel grooving machine, a rotary cutter shaped to form a curved shank lip surface on a heel blank, a heel blank holder mounted for movement relative to the cutter to carry a heel blank with its top-lift end leading into engagement with the cutter in a path generally parallel to the vertical axis of a heel blank in the holder, and stop means effective without attention on the part of the operator to arrest the relative movement of the holder and cutter when the cutter has reached the location of the under side of the shank lip portion of the heel blank.

9. In a heel grooving machine, a rotary cutter head having an effective surface of revolution which includes a part of the end of a cylinder with thickened walls, a heel blank holder pivoted on an axis making an angle of approxmately 90 with the axis of the cylinder and arranged to feed a heel blank thereon into engagement with the cutter head with its top-lift end leading, and stop means for arresting the feed when the cutter head has reached a point short of the attaching face of the heel blank.

10. In a heel grooving machine, a rotary cutter head having an effective surface of revolution which includes a part of the end of a cylinder with thickened walls, a heel blank holder pivoted on an axis transverse to the axis of the cylinder and arranged to feed a heel blank thereon into engagement with the cutter head with its top-lift end leading, and stop means for arresting the feed when the cutter head has reached a point short of the attaching face of the heel blank.

CUTLER D. KNOWLTON. 

